• 2016/1/22 3,将id为005的对象从集合中移除


     1 package shuzu;
     2 
     3 public class Emp {
     4 private String id;
     5 private String name;
     6 
     7 public Emp(String id, String name) {
     8     super();
     9     this.id = id;
    10     this.name = name;
    11 }
    12 
    13 public String getId() {
    14     return id;
    15 }
    16 
    17 public void setId(String id) {
    18     this.id = id;
    19 }
    20 
    21 public String getName() {
    22     return name;
    23 }
    24 
    25 public void setName(String name) {
    26     this.name = name;
    27 }
    28 
    29 
    30 
    31 }
     1 package shuzu;
     2 
     3 import java.util.*;
     4 
     5 public class TestMap {
     6 
     7     /*创建Map集合,创建Emp对象,并将创建的Emp对象添加到集合中
     8      * (Emp对象的id作为Map集合的键),并将id为005的对象从集合中移除*
     9      *
    10      */
    11     public static void main(String[] args) {
    12         Emp id1=new Emp("001","狮子");
    13         Emp id2=new Emp("002","老虎");
    14         Emp id3=new Emp("003","斑马");
    15         Emp id4=new Emp("004","羚羊");
    16         Emp id5=new Emp("005","猎豹");
    17         Emp id6=new Emp("006","大象");
    18         
    19         HashMap<String,String> Map=new HashMap<String,String>();
    20         
    21         Map.put(id1.getId(), id1.getName());
    22         Map.put(id2.getId(), id2.getName());
    23         Map.put(id3.getId(), id3.getName());
    24         Map.put(id4.getId(), id4.getName());
    25         Map.put(id5.getId(), id5.getName());
    26         Map.put(id6.getId(), id6.getName());
    27         
    28         Set u=Map.keySet();
    29         
    30         System.out.println("Map集合中所有元素是: ");
    31         Iterator t=u.iterator();
    32        while(t.hasNext()){
    33           String id =(String) t.next();
    34           String name=Map.get(id);
    35           System.out.println("第"+id+"号是"+name);
    36        }
    37        Map.remove("005");
    38        System.out.println("去除005后Map集合中所有元素是: ");
    39        Iterator ts=u.iterator();
    40        while(ts.hasNext()){
    41            String id =(String) ts.next();
    42            String name=Map.get(id);
    43            System.out.println("第"+id+"号是"+name);
    44         }
    45     }
    46     }

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  • 原文地址:https://www.cnblogs.com/haodayikeshu/p/5152418.html
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